diff --git a/homeassistant/components/twinkly/light.py b/homeassistant/components/twinkly/light.py
index 6f6dffe63d2..771af2282dc 100644
--- a/homeassistant/components/twinkly/light.py
+++ b/homeassistant/components/twinkly/light.py
@@ -28,7 +28,7 @@ from homeassistant.const import (
 )
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import device_registry as dr
-from homeassistant.helpers.device_registry import DeviceInfo
+from homeassistant.helpers.device_registry import CONNECTION_NETWORK_MAC, DeviceInfo
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 
 from .const import (
@@ -97,6 +97,7 @@ class TwinklyLight(LightEntity):
         # They are expected to be updated using the device_info.
         self._name = conf.data[CONF_NAME] or "Twinkly light"
         self._model = conf.data[CONF_MODEL]
+        self._mac = device_info["mac"]
 
         self._client = client
 
@@ -114,6 +115,7 @@ class TwinklyLight(LightEntity):
         """Get device specific attributes."""
         return DeviceInfo(
             identifiers={(DOMAIN, self._attr_unique_id)},
+            connections={(CONNECTION_NETWORK_MAC, self._mac)},
             manufacturer="LEDWORKS",
             model=self._model,
             name=self._name,
diff --git a/tests/components/twinkly/__init__.py b/tests/components/twinkly/__init__.py
index f322004962a..192a5c0e220 100644
--- a/tests/components/twinkly/__init__.py
+++ b/tests/components/twinkly/__init__.py
@@ -7,6 +7,7 @@ from homeassistant.components.twinkly.const import DEV_NAME
 TEST_HOST = "test.twinkly.com"
 TEST_ID = "twinkly_test_device_id"
 TEST_UID = "4c8fccf5-e08a-4173-92d5-49bf479252a2"
+TEST_MAC = "aa:bb:cc:dd:ee:ff"
 TEST_NAME = "twinkly_test_device_name"
 TEST_NAME_ORIGINAL = "twinkly_test_original_device_name"  # the original (deprecated) name stored in the conf
 TEST_MODEL = "twinkly_test_device_model"
@@ -31,6 +32,7 @@ class ClientMock:
         self.device_info = {
             "uuid": self.id,
             "device_name": TEST_NAME,
+            "mac": TEST_MAC,
             "product_code": TEST_MODEL,
         }
 
diff --git a/tests/components/twinkly/snapshots/test_diagnostics.ambr b/tests/components/twinkly/snapshots/test_diagnostics.ambr
index 28ec98cf572..4d25e222501 100644
--- a/tests/components/twinkly/snapshots/test_diagnostics.ambr
+++ b/tests/components/twinkly/snapshots/test_diagnostics.ambr
@@ -15,6 +15,7 @@
     }),
     'device_info': dict({
       'device_name': 'twinkly_test_device_name',
+      'mac': '**REDACTED**',
       'product_code': 'twinkly_test_device_model',
       'uuid': '4c8fccf5-e08a-4173-92d5-49bf479252a2',
     }),